Omexag

For growers who are new or just have a few years of growing the crop. How Heat Affects Canola Pod Fill Canola is most sensitive during flowering through early pod fill (roughly when pods are elongating and seeds are filling). Optimal daytime temps are ~20–25°C; stress ramps up above 28–30°C, with severe impacts above 32–35°C (especially with low humidity or wind, which increases evapotranspiration). Key impacts: • Flower abortion & poor pod set: High temps reduce pollen viability and fertilization success. Flowers drop instead of forming pods. • Shorter pod fill duration: Seeds fill faster but incompletely — smaller, lighter seeds (lower thousand seed weight). • Reduced seed number per pod: Fewer seeds set or aborted mid-fill. • Quality hit: Higher green seed, lower oil content, and test weight issues (your “poor quality” Alberta/MB zones amplify this). • Compounding factors: If preceded by excess moisture/flooding (as in parts of SK/MB), roots are shallower and plants are less resilient to sudden heat. Hail damage adds entry points for disease. Duration & severity matter: A 2–3 day spike in the 30s°C is damaging but recoverable in some cases. A prolonged/extreme system (especially >35°C with nights not cooling off) can cut yields 10–30%+ in affected fields, depending on staging. Late-week heat hitting mid-to-late pod fill is particularly bad for final seed weight.